2188308168 has 108 divisors (see below), whose sum is σ = 6132332115. Its totient is φ = 704958336.

The previous prime is 2188308107. The next prime is 2188308173. The reversal of 2188308168 is 8618038812.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

2188308168 is a `hidden beast` number, since 2 + 188 + 308 + 168 = 666.

2188308168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 1135824804 + 1052483364 = 33702^2 + 32442^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=33078.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 14686558 + ... + 14686706.

Almost surely, 2^2188308168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2188308168

2188308168 is an abundant number, since it is smaller than the sum of its proper divisors (3944023947).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2188308168 is a wasteful number, since it uses less digits than its factorization.

2188308168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 45.

The square root of 2188308168 is about 46779.3562161772. The cubic root of 2188308168 is about 1298.2833689254.

The spelling of 2188308168 in words is "two billion, one hundred eighty-eight million, three hundred eight thousand, one hundred sixty-eight".